AUTHOR=Chen Chen , Wu Hongfeng , Yang Likun , Kan Ke , Zhang Xinping , Zhang Su , Jia Rufu , Li Xian TITLE=Network analysis of chronic disease among middle-aged and older adults in China: a nationwide survey JOURNAL=Frontiers in Public Health VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1551034 DOI=10.3389/fpubh.2025.1551034 ISSN=2296-2565